So you are sure there is no power at the fuel pump. Now what?

First, collect all the clues you can. Do you have ground at the pump? Do any of the other wires on the connector receive signal or have ground? If none of the wires work at all the harness is likely cut or damaged or you’re testing the wrong side of the harness. It happens. If it’s only the one power wire its time to look into why. It’s best to have a wiring diagram to rule out obvious issues specific to your car. The goal is to track power from the battery to the pump. We know its not at the pump so pick the easiest place power would be in between the battery and the pump. This finding will tell you which half of the circuit to look into. keep testing at the easiest connection on the side of the circuit that has failed until you have located your issue. Typically the fuse box and a relay are the first two spots to check but sometimes this isn’t possible.